You can download the software and access the free trial by going to my online store and clicking on the "MDS Express Trial" on the right side.

Once the 30-day free trial period is over, you can purchase the downloadable or disc version of the software to continue using it. You'll simply open up the trial version you already have on your computer, and will be prompted to enter the product registration key you received after purchasing the software. (You'll receive this key via e-mail if you purchase the downloadable version, and you'll find it along with your shipped software if you purchase the disc version.)